Wire mesh cable trays are a versatile and efficient solution for organizing and protecting cables in various industries, from data centers to industrial plants. Their open design allows for excellent airflow, easy maintenance, and flexibility in cable routing. Useful, yes, but mostly limited to IT rooms or small control setups. What Changed in the Way. -piece tray istypically used in applications where visual esthetics are important. It is available with a ventilated or solid bottom. 5, 2, 4, 6, 8, 12, 16, 18, 20, and 24 inches c.